Teuf that cat looks kinda black, you might wanna clean it out or replace it.

 

i got pulled over because my '86 22R was "too loud".

i was running a cheap turbo muffler and turndown...no Cat...with a Header.

i drove it with an open header for about a week...never got stopped..and it was LOUD.

as the cop was talking to me on how illegal my exhaust was...there was a '70 Nova that drove by running Open Headers, and drag slicks...the cop glanced over looked at the car...smiled and waved...and continued to preach to me about my illegal exhaust.

i can't wait until this years cruise night (this coming weekend), my '92 4runner with be there..and it's going to be running OPEN exhaust....no pipes lmao

 

 

^ lmao

 

WHAT? i only got $25 a piece for mine, and ive sold 3!

 

You will never pass emissions without a cat. 22re's just barely pass as it is.

 

Yeah and just because you don't have testing now doesn't mean it will never happen. As standards get more and more strict more States are having to add testing. We are probably going to have testing added here soon because of the southern winds up from Dallas/FW area.

 

You may be getting ripped off, they looked at mine (3.0 cat from a 93 truck) and said "oh that's one of the good ones". Some models/years are more valuable than others.

 

by the time I have emissions in south dakota, that truck will be so old and beat down it will probably become my ranch truck anyway

 

Its a Toyota, no it won't

 

I've heard from several people that the cat slows down the exhaust giving the oxygen sensor time to read the exhaust, and allowing the ecm to make adjustments to the mix.

 

gutted mine, sounded better, I could actually hear the exhaust over the clutch fan, but it ran like crap.

I had a 40 series flowmaster behind it.

I put the cat back and it runs 10 times better and actually has a powerband again, boy how I have missed that.

My advice dont do it, these motors love back pressure and from my experience a stopped up cat is better than no cat.

Oh, this was on a 3.0 pickup

 

yours prolly ran like crap because of the O2 sensor(s)

ima take mine off....no doubt ...in fact it will probably run with no exhaust for a bit outside my garage to get it on the trailer to go get the exhaust done

 

No motor/engine loves or "thrives on" backpressure! PERIOD! That's one of the most ignorant statements that can be made regarding engine performance.

Read this.

 

some backpressure is good...too much is BAD..and too little is BAD..

 

Will removing the cat on my 22re cause any o2 sensor codes to start flashing? Trying to decide whether or not to remove mine.

 

Shouldn't. Cat is downstream and has nothing to do with fuel delivery and O2 sensor. Except maybe if you have a Cali emission vehicle. Not sure if they have one after cat??

 

Yeah, the O2 is precat, at least on mine too. I have no resonator or cat, if it's older than 1995 you don't need one up here IIRC.

 

Mine is 1989 4x4. O2 is before the cat. What about the guys who say removing the cat made there truck run like crap?

 

I knocked the stuffing out of my CAT 3 years & 32k miles ago. Sounds great, runs great. no issues. Backpressure is not a "requirement" LOL~